fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-UNDEFSAFE-548940

package-lock.json

@@ -4525,9 +4525,9 @@
       "dev": true
     },
     "undefsafe": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.2.tgz",
-      "integrity": "sha1-Il9rngM3Zj4Njnz9aG/Cg2zKznY=",
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/undefsafe/-/undefsafe-2.0.3.tgz",
+      "integrity": "sha512-nrXZwwXrD/T/JXeygJqdCO6NZZ1L66HrxM/Z7mIq2oPanoN0F1nLx3lwJMu6AwJY69hdixaFQOuoYsMjE5/C2A==",
       "requires": {
         "debug": "^2.2.0"
       },

package.json

@@ -63,7 +63,7 @@
     "semver": "^5.7.1",
     "supports-color": "^5.5.0",
     "touch": "^3.1.0",
-    "undefsafe": "^2.0.2",
+    "undefsafe": "^2.0.3",
     "update-notifier": "^2.5.0"
   },
   "version": "0.0.0-development"